(Remaining above the fray) here's recommended Key Tire Age Guidelines:
6 Years (The Standard Limit) 10 Years (The Absolute Limit)
How to Check Your Tire's Manufacture Date. You can find a tire's exact age by locating the DOT code on the outer sidewall. Look for the letters "DOT" followed by a string of numbers. The last four digits will indicate the week and year the tire was produced. Example: A code ending in 2426 means the tire was manufactured in the 24th week of the year 2026.